On March 3-4, 2016, the China Civil Engineering Society held a meeting in Beijing to conduct an acceptance review of the research results of the sub-topics of the "12th Five-Year" National Science and Technology Support Program project "Key Technologies for Safety and Environmental Control in Soft Soil Underground Space Development Engineering" (hereinafter referred to as the "Project") — namely, "Testing and Evaluation Technology for Safety-Sensitive Factors in Soft Soil Engineering", "Unsupported Support Technology for Large-Area Deep Foundation Pits in Soft Soil", "Foundation Pit Support Technology Combining Support Structure with Main Structure", "Evaluation and Control Technology for Environmental Impact of Urban Soft Soil Geotechnical Engineering", "Information-Based Monitoring and Early Warning Technology for Urban Soft Soil Foundation Pit Construction Based on Digital Images", and "Comprehensive Energy Underground Engineering Technology Integrating Heat Exchangers with Underground Structures" (hereinafter referred to as the "6 Key Technologies"). More than 30 experts and project team members from Beijing, Hangzhou, Lanzhou, Shanghai, Fuzhou, Tianjin, Wuhan and other places attended the meeting. The meeting was chaired by Researcher Zhang Yan, project leader of the China Civil Engineering Society. Liu Shijie, Vice Chairman of the China Civil Engineering Society, attended the meeting and delivered a speech. Yao Qiushi from the Department of Science and Technology of the Ministry of Housing and Urban-Rural Development, and Zheng Wenhua from the China Academy of Building Research, the lead unit of the project, attended the meeting and provided guidance.

　　The attending experts believed that: 1. Through equipment development, in-situ testing, laboratory tests, theoretical analysis and numerical simulation, and extensive engineering application practices, the results of "Testing and Evaluation Technology for Safety-Sensitive Factors in Soft Soil Engineering" have been achieved. The results are outstanding in independent innovation, have broad application prospects, and have reached the international leading level overall. 2. Through investigation, on-site measurement, model tests and numerical simulation analysis, and engineering application, a complete set of technologies for unsupported support of large-area deep foundation pits in soft soil has been formed. The results are highly innovative, have broad application prospects, and have reached the international leading level overall. 3. Comprehensive and systematic research and engineering application have been carried out on the calculation and analysis methods, design methods, and key construction technologies of foundation pit support technology combining support structure with main structure. The results are innovative, have broad application prospects, and have reached the international leading level. 4. Through theoretical deduction, numerical simulation, on-site measurement, and engineering application, a comprehensive energy underground structure technology integrating heat exchangers with underground structures has been developed. The results are outstanding in independent innovation, have broad application prospects, and have reached the international advanced level overall, among which the technology integrating heat exchangers with underground structures has reached the international leading level. 5. Through investigation, on-site measurement analysis, laboratory tests, numerical simulation and analytical analysis, and engineering application, research results on "Evaluation and Control Technology for Environmental Impact of Urban Soft Soil Geotechnical Engineering" have been achieved in tunnel construction, foundation pit excavation, and groundwater dewatering under complex urban environmental conditions in soft soil areas. The results are innovative, have broad application prospects, and have reached the international leading level. 6. Through theoretical research, software development, model tests, on-site tests, and engineering practice, research results on information-based monitoring and early warning technology for urban soft soil foundation pit construction based on digital images have been formed. The results are innovative, have broad application prospects, and have reached the international advanced level overall.

　　During the meeting, the project team also held an internal seminar to arrange and deploy work such as acceptance of demonstration projects and project acceptance.